| Marinovative Construction INC | Christopher John Whitmore | — | (415) 713 1250 | GC, remodel, ADU | Novato · Marin County | — | — |
| Marinwood Builder | Marinwood Builder | — | (415) 637 8557 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mario Cruz Painting | Mario Cruz Painting | cruzmario1486@gmail.com | (415) 685 7176 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Marion Landscaping | Marion Landscaping | — | (415) 382-9404 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Mark A Pearce | Mark A Pearce | — | (415) 640 5361 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mark Berger | Mark Berger | — | (415) 308 7178 | Windows, patio, painters | San Anselmo · Marin County | — | — |
| Mark Gelardi Structures | Mark Gelardi Structures | — | (415) 279 4917 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mark Harkin Construction | Mark John Harkin | — | (415) 601 3285 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mark Judson | Mark Judson | — | (415) 305 5742 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Mark Le Vine General Contractor | Mark Le Vine General Contractor | — | (415) 456 5466 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mark Mohtashem Construction | Mark Searous Mohtashem | — | (415) 601 7805 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Mark Moran Construction | Mark Anthony Moran | — | (415) 897 2462 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mark Nolan General Contractor | Mark Nolan General Contractor | — | (415) 479 5634 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mark W Brougham Contractor | Mark W Brougham Contractor | — | (415) 717 0595 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Mark Welte | Mark Welte | — | (415) 760 3799 | GC, remodel, ADU | Novato · Marin County | — | — |
| Marron Construction | Matthew Wystan Marron | — | (415) 613 6498 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Marshal Rothman | Marshal Rothman | — | (415) 383 1356 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Marshall & Co. Property Management | Marshall & Co. Property Management | info@marshallproperty.com | (415) 455-1111 | Property managers | San Rafael · Marin County | — | — |
| Marshall Johnson Painting | Marshall Johnson Painting | 3mjmjmj@gmail.com | (415) 699 4692 | Windows, patio, painters | San Geronimo · Marin County | — | — |
| Martin's Flooring Installation | Martin's Flooring Installation | — | (415) 756 2875 | Other | Novato · Marin County | — | — |
| Marvin Construction INC | Avila David Flores | — | (451) 879 1186 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mary Del Giorno DBA Ovelle Irrigation | Ovelle Irrigation | — | (415) 250 3165 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Mason Plumbing INC | Cameron Packard Mason | info@masonplumbing.com | (415) 456 4554 | Other | San Anselmo · Marin County | — | — |
| Masterbuild Works LLC | Marcelo Flores Sanchez | info@masterbuildworks.net | (801) 318-1547 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mastercraft Landscapers INC | Eliezer Edmery Calderon Rodas | — | (415) 756 9590 | Windows, patio, painters | Novato · Marin County | — | — |
| Masterpiece Remodeling INC | David Leonard Horton | — | (415) 226 8486 | GC, remodel, ADU | Novato · Marin County | — | — |
| Masterplan Painting | Masterplan Painting | — | (415) 472 9894 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Masters Woodworking INC | Brent Robert Mc Elroy | interested@domainmarket.com | (415) 895 1617 | GC, remodel, ADU | Novato · Marin County | — | — |
| Mathew Nickelson Plumbing | Mathew Nickelson Plumbing | — | (415) 892 0681 | Other | Novato · Marin County | — | — |
| Matson Construction Management | Bret Wesley Matson | — | (702) 280 6014 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Matt Butler DBA San Rafael Yacht Harbor | San Rafael Yacht Harbor | — | (415) 456 1600 | Other | San Rafael · Marin County | — | — |
| Matthew C Lucas Construction | Matthew Curtis Lucas | — | (415) 307 3649 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| Matthew Cogley Construction | Matthew Eli Cogley | — | (415) 516 1779 | GC, remodel, ADU | Novato · Marin County | — | — |
| Matthew Edward Stewart | Matthew Edward Stewart | — | (415) 672 9727 | Electricians | Fairfax · Marin County | — | — |
| Matthew Lawrence Construction INC | Matthew David Lawrence | — | (415) 203 5547 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mauricio E Gonzalez | Mauricio E Gonzalez | — | (415) 320 0415 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Mav Perfect Paint | Mav Perfect Paint | — | (415) 877 0127 | Windows, patio, painters | Corte Madera · Marin County | — | — |
| Maverick Construction & Landscape LLC | Graham Maury Maverick | — | (415) 497 2700 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Max Builders | Max Builders | — | (415) 847 1206 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Max Electric | Maksim Rashchepkin | — | (267) 709 3336 | Electricians | San Rafael · Marin County | — | — |